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cfg80211: fix elapsed_jiffies calculation

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MAX_JIFFY_OFFSET has no meaning when calculating the
elapsed jiffies, as jiffies run out until ULONG_MAX.

This miscalculation results in erroneous values
in case of a wrap-around.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Eliad Peller 2014-06-17 13:07:02 +03:00 committed by Johannes Berg
parent e33e2241e2
commit 0ce12026d6
1 changed files with 1 additions and 1 deletions
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2
net/wireless/core.h
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@ -424,7 +424,7 @@ static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
if (end >= start) if (end >= start)
return jiffies_to_msecs(end - start); return jiffies_to_msecs(end - start);
return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); return jiffies_to_msecs(end + (ULONG_MAX - start) + 1);
} }
void void